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MCOL-1793 Window functions fail when current row outside of window

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This commit is contained in:
David Hall
2018-10-29 12:18:15 -05:00
parent e14e58ab6c
commit 72eb1d7345
6 changed files with 36 additions and 458 deletions
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20
utils/udfsdk/docs/source/usage/sourcefile.rst Normal file → Executable file
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@ -124,9 +124,9 @@ nextValue()
nextValue() is called from the PM for aggregate usage and the UM for Analytic usage.
valsIn contains a vector of all the parameters from the function call in the SQL query (In Columndtore 1.1, this will always contain exactly one entry).
valsIn contains a vector of all the parameters from the function call in the SQL query.
Depending on your function, you may wish to be able to handle many different types of input. A good way to handle this is to have a series of if..else..if statements comparing the input type and dealing with each separately. For instace, if you want to handle multiple numeric types, you might use::
Depending on your function, you may wish to be able to handle many different types of input. There's a helper template function convertAnyTo() which will convert the input static:any value to the designated type. For Example, if your internal accumulater is of type double, you might use::
static_any::any& valIn = valsDropped[0].columnData;
AVGData& data = static_cast<MedianData*>(context->getUserData())->mData;
@ -137,21 +137,7 @@ Depending on your function, you may wish to be able to handle many different typ
return mcsv1_UDAF::SUCCESS; // Ought not happen when UDAF_IGNORE_NULLS is on.
}
if (valIn.compatible(charTypeId))
{
val = valIn.cast<char>();
}
else if (valIn.compatible(scharTypeId))
{
val = valIn.cast<signed char>();
}
else if (valIn.compatible(shortTypeId))
{
val = valIn.cast<short>();
}
.
.
.
val = convertAnyTo<double>(valIn);
Once you've gotten your data in a format you like, then do your aggregation. For AVG, you might see::